<template>
  <form-item-wrapper :designer="designer" :field="field" :rules="rules" :design-state="designState"
                     :parent-widget="parentWidget" :parent-list="parentList" :index-of-parent-list="indexOfParentList"
                     :sub-form-row-index="subFormRowIndex" :sub-form-col-index="subFormColIndex"
                     :sub-form-row-id="subFormRowId"
                     :in-table-flag="inTableFlag"
                     :column-prop="columnProp"
  >
    <el-checkbox-group ref="fieldEditor" v-model="fieldModel" v-show="!isReadMode"
                       :disabled="field.options.disabled"
                       :class="{'design-style': designState}"
                       @change="handleChangeEvent">
      <template v-if="!!field.options.buttonStyle">
        <el-checkbox-button v-for="(item, index) in field.options.optionItems"
                            :value="item[field.options.valueKey]"
                            :key="index"
                            :label="item[field.options.labelKey]"
                            :disabled="item.disabled" :border="field.options.border"
        >
        </el-checkbox-button>
      </template>
      <template v-else>
        <el-checkbox v-for="(item, index) in field.options.optionItems"
                     :value="item['value']"
                     :key="index"
                     :label="item['label']"
                     :disabled="item.disabled"
                     :border="field.options.border"
        >
        </el-checkbox>
      </template>
    </el-checkbox-group>
    <template v-if="isReadMode">
      <span class="readonly-mode-field">{{ optionLabel }}</span>
    </template>
  </form-item-wrapper>
</template>

<script>
import FormItemWrapper from './form-item-wrapper'
import emitter from '@/utils/emitter'
import i18n, { translate } from '@/utils/i18n'
import fieldMixin from '@/components/form-designer/form-widget/field-widget/fieldMixin'
import serviceMixin from '@/components/form-render/serviceMixin'

export default {
  name: 'checkbox-widget',
  componentName: 'FieldWidget',  //必须固定为FieldWidget，用于接收父级组件的broadcast事件
  mixins: [emitter, fieldMixin, i18n, serviceMixin],
  props: {
    field: Object,
    parentWidget: Object,
    parentList: Array,
    indexOfParentList: Number,
    designer: Object,

    designState: {
      type: Boolean,
      default: false,
    },

    subFormRowIndex: { /* 子表单组件行索引，从0开始计数 */
      type: Number,
      default: -1,
    },
    subFormColIndex: { /* 子表单组件列索引，从0开始计数 */
      type: Number,
      default: -1,
    },
    subFormRowId: { /* 子表单组件行Id，唯一id且不可变 */
      type: String,
      default: '',
    },

  },
  components: {
    FormItemWrapper,
  },
  data() {
    return {
      oldFieldValue: null, //field组件change之前的值
      fieldModel: null,
      rules: [],
    }
  },
  computed: {},
  beforeCreate() {
    /* 这里不能访问方法和属性！！ */
  },

  created() {
    /* 注意：子组件mounted在父组件created之后、父组件mounted之前触发，故子组件mounted需要用到的prop
       需要在父组件created中初始化！！ */
    this.registerToRefList()
    // this.initOptionItems()
    this.initFieldModel()
    this.initEventHandler()
    this.buildFieldRules()

    this.handleOnCreated()
    this.field.options.autoLoad && this.loadData()
  },

  mounted() {
    this.handleOnMounted()
  },

  beforeUnmount() {
    this.unregisterFromRefList()
  },

  methods: {},
}
</script>

<style lang="scss" scoped>
/* form-item-wrapper已引入，还需要重复引入吗？ */
@import '@/styles/design-style.scss';

.design-style {
  @include design-style('多选项');
}
</style>
